Rotary pump.



J. O. HBINZE, JB.

ROTARY PUMP.

APPLICATION FILED JAN. I4, 1914.

1,132,263. Patented Mar.16,1915.

Waess es 'I [27 76W 77/ 'UNITED STATES PATENT onirica.

JOHN O. HEINZE, JR., OF DETROIT, MICHIGAN, ASSIGNOR TO GENERAL MOTORSCOMPANY, OF DETROIT, MICHIGAN, A CORPORATION 0F NEW JERSEY.

ROTARY PUMP.

Specification of Letters Patent.

Patented'Mar. 16, 1915.

Application filed January 14, 1914. Serial No. 811,992.

To ali lw/zom it may," concern: Be it known that I, Jol-1N O. HEiNzn,Jr., a citizen of the United States of America, residing at Detroit, inthe county of IVayne and State of Michigan, have invented certain newand useful Improvements in R0- tary Pumps, of which the following is aspecification, reference being had therein lto the accompanyingdrawings.

The invention relates to rotary pumps of a type frequently used forpropelling the water in the circulating system of an engine cooler andfor similar purposes. In the present state of the art it is usual to`form the casings for such pumps of die castings. My improvedconstruction is lighter and less expensive to manufacture, by beingformed of sheet'metal stampings.

In the drawings: Figure 1 is an elevation of one of the half sections ofthe casing; Fig. Q is a cross section on line -w Fig. l; Fig. 3 is asection on line 'y-flh' and Fig. 4 is a perspective view of the guardplate for the inlet connection.

A is a sheet metal stamping formed with a circular chamber B forreceiving the rotary impeller, and with a hub portion C projectingtherefrom and returning at D to form a bearing for the impeller shaft,and the stamping is also provided with a tangential outlet passage E F,while a peripheral flange G serves for bolting or otherwise securing thesection to a duplicate complementary part.

To produce an operative rotary pump, it is necessary to direct the inletpassage to the center of the impeller and to shield this passage fromthe centrifugal force of the'rotating water at the periphery. Such aconstruction cannot, however, be formed from a single stamping withoutgreat complexity in the forming dies. I have therefore devised aconstruction in which a shield or deflector formed of a separatestamping is attached to the main stamping and covers the inlet passageat the periphery. As specifically shown, H is a stamping which is of across section corresponding to that of the main stamping at theperiphery of the central chamber B. This stamping II is placed in arecess formed in the main stamping, so as to centrally cover the inletopening F .and to extend inward along the side. The

recess I in which the stamping H is placed and a radial inlet passage 'ginlet passage,

is of the proper depth so that the inner face of said stamping H isflush with the inner face of the portion of the main stamping formingthe walls of the chamber B. rlhe inlet passage F is however suiiicientlyem bossed to extend around the deflector, as indicated at F', and thusthe water entering through the passage Fl will be directed'toward thecenter of the chamber/B before it comes in cont-.ict ,with theimpeller'.r I preferably attach the stamping H to the main stamping byspot-welding.

With the construction as described the weight of the casing is reducedfrom that necessary with a die casting, and the cost of manufacture isalso reduced.

What I claim as'my invention is,-

1. In a rotary pump, with a casing formed Iof a sheet metal stampinghaving impeller and inlet and outlet passages communicating with sa'idchamber, of a shield or deflector for completing the peripheral wall ofsaid chamber opposite the inlet passage and deliecting the ingress tothe center of said chamber.

the combination a chamber therein for the v 2. In a rotary pump, thecombination with a casing formed of a sheet metal stamping having acircular embossed ortion forming a chamber for the rotary impeller, atancntial outlet passage connecting with said chamber and a radial inletpassagemf a deflector for completing the peripheral wall of said chamberopposite said radial. inlet passage and deflecting the latter to theside thereof.

3. In a rotary pump, a casing formed of a sheet metal stamping having acircular embossed portion forming a chamber for the impeller, atangential outlet passage communicating with said chamber and a radialand anauxiliary sheet metal stamping 'secured to the main stampingforming a continuation of thel peripheral wall of said central chamberopposite the radial inlet and deflecting the liquid passing through thelatter to one side thereo v 4., In a rotary pump, a casingformed of asheet metal stamping having a circular embossed portion forming achamber forthe impeller and aradial inlet passage, and

an auxiliary stamping engaging a recess in said main stamping to form acontinuation ofthe peripheral Wall of said chamber iiush with the innerface thereof and extending 6. In a rotary pump, a casing formed of upthe side to'defiect4 the liquid in said inlet sheet metal stampinghaving a central chamtoWard the center of said chamber. ber and inletand outlet passages connect- 5. In a rotary pump, a casing vformed ofing therewith, andan' insert in the Wall of 5 a sheet metal stampingvhaving a central Sald casingforming a-bridge across said in- 2 chamber,a tangential outlet and a' radial let passage for continuing theperipheral inlet, with a projecting marginal flange for wall of saidchamber and deliectingthe liqconnection of `Said stamping with acom'p1e-. uid in said inlet toward the center of said mentary stamping,and anauxiliary stampchamber.-

10 ing fitting in a rec'ess in the Wall of said In'testimonywhereofI'aiix my signature 2 main stamping andV forming a ehield or deinpresence of two Witnesses.

Hector, and continuing the peripheral Wall JOHN O.HEINZE, JR*l of saidchamber across said inlet and direct 4Witnesses: n. v ing the liquid inthe latter toward the center Y WM. J. BEL'KrLiP,y

` 15 o f said chamber.

y l Jamas P. BARRY.

